Home / 39,890.26-55,048.94-21,985.92

Finding the Fourth Proportional to 39,890.26, 55,048.94 and 21,985.92

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Solution

The fourth proportional to 39,890.26, 55,048.94 and 21,985.92 is: 30,340.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,890.26 : 55,048.94 = 21,985.92 : x
  2. Step 2: Convert to fraction form
    39,890.26/55,048.94 = 21,985.92/x
  3. Step 3: Cross multiply
    39,890.26x = 55,048.94 × 21,985.92
  4. Step 4: Simplify right side
    39,890.26x = 1,210,301,590.92
  5. Step 5: Solve for x
    x = 1,210,301,590.92/39,890.26
  6. Step 6: Final answer
    x = 30,340.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.